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w. SPARKS. SIGNAL.

APPUCATION FILED NDV. I4, HHS.

Patented Aug. 5, 1919.

I INVENTOR.

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-of simple and gbrppai'a tiy UNITED STATES WILLIAE SFARKS; 0? JACIQQOE B21133 PATENT OFFICE.

This invention 1:91 @511} gpl'flw' 1 mm Q W a? a g hww th. 1 Rim. azisi a? s mgioatm 61. Lelm yum means for WWW! 21 1 1m:

3, id? @lflwii zn Q? he A 1 w v will. ham P i allx hwkm I with twisted so as to form a spiral of suitable pitch so that a eoacting nut l4-, if held from rotation and moved along said shaft, will cause rotation of the same. For the purpose of holding said nut from rotation when moved in one direction and thereby causing rotation of the shaft -1land for allowing a return of said nut to normal position on the shaft without rotation of said shaft by allowing the nut itself to rotate upon the return movement, a case .-15 1s provided adapted to be positioned on said shaft 1 1 and having a seat 16 formed concentric with the shaft opening 17- for the reception of the nut 14- which has one of its faces provided with'a plurality of ratchet teeth having abrupt radial faces on one side only, and adapted to engage projections or stops 1 8 when the ratchet is turned in one direction and to freely ride over said stops when moving in the other direction.

The case -15- is provided with a suit able cover l$) secured thereto in any suitable manner and adapted to inclose the nut -14. This nut -14 has an opening 20 of a form adapted to cooperate with the shaft 11 for transferring the direct movement ofthe nut into a rotary movement ofthe shaft, and in the form shown this openin is substantially square and preferably as the planes of its inclosing face's obliquely vdisposed with respect to its axis to facilitate the starting of the relative movement of the parts.

The case -I5 is sufficiently deep to allow the nut 14 to lie in aposition at which the teeth thereon will not engage the stops 18- upon the case. In other Words, the seat within the case is of sufiicient depth or size to, allow the nut -14 with the teeth thereon to move out of engagement with the stops upon the case so that the nut may freely rotate with respect to the case. When the case is moved 'down by the operatin handle, the inertia of the shaft 11 an the parts carried thereby cause the nut to move aiiially within the case to such a position that the teeth upon the nut come into engagement with the stops 'upon the case to prevent rotation of the nut while the case is being moved in that direction. -When the case is moved in a reverse direction, the nut drops down by gravity and the case is moved axially with respect to the nut, which remains stationary due to the inertia of the shaft, thereby dlseng'aging the teeth 11 on the nut with the stops upon the case so t at the nut may freely rotate within the case so lon as it is beingmoved in that direction.

file case -15 he nut -14: and the cover -19 form a device which is hereinafter termed a ratchet clutch, and for the purpose of moving this clutch along the shaft 1 1- whereby the shaft is rotated by the action of the nut ---ll----, the case l5 is provided with oppositely dis-posed pintles 21- and 22- suitably engaged by jaws 23- and --24 formed upon the bifurcated end 25 of an operating lever -26. The lever -2(i is pivoted upon a bolt 27- supported in any suitable manner as by an angle bar -E28-" operably secured to the casing 6 by screws 29.

A suitable spring 30 has its central portion tensioned around the bolt 27 and its ends respectively bearing against the casing 6' and the lever 2 on the side of its pivot next the ratchet clutch, so that the spring normally tends to return the lever to starting position after each operation and this return is rapid and easy by reason of the fact that the teeth upon the nut --'l4--- slide over the stops 1 8- upon this return movement so that the nut itself may rotate, thereby obviating the rotation of the shaft 11-- and the vibration of the die plil'ugin as hereinafter described.

A suitable toothed or cam wheel -3l is mounted on the shaft --l l-- and preferably has its marginal portion disposed in a plane substmitially midway of the diaphragm 1 and operating through a slot -36 formed in the depressed portion 5 of the case section -3 and its central portion depressed or effect from the plane of its marginal portion, so that the cam wheel may force the vibration of the diaphragm at substantially the central point thereof, and yet the shaft -11 may have its spirally arranged portion extend somewhat more than one-half the length of the shaft so that a more extensive rotary movement may be imparted to the cam wheel than would be per sible if the wheel were jou'rnaled upon the central I ortion of the shaft -ll-.

The c iaphragin --1- is provided with a suitable contact member --32 cooperating with the Wheel 31 to vibrate the dia phragm, and this contact member is preferably externally threaded for coaction with an internally threaded'bushing 33 secured to the diaphragm in any suitable manner, as by having one of its ends welded over a washer 3t4e and the contact member may be adjusted toward and from the toothed wheel 31 by vmeans of this threaded relation and may be locked in an predetermined adjusted position by a Ioc nut -35-.

It will now be apparent that by reason of the relatively large'size of the Wheel 31 and the ossibility of rapid rotation of the shaft 11 by the means disclosed, a very rapid vibration of the diaphragmmaysbe forced and that said forced vibration may continue for any desired space of time, limited solel by the possible extent of movement of t 1e operating nut 14- along the shaft -11-, and that this forced vibration her for moving the shaft actuator along the shaft, said shaft actuator and said meniher havinga limited movement relatively to each other in a direction axiallv of the shaft,

and clutch devices in connection with the shaftactuator and said member adapted to interengage'upon movement ofsaid member in one direction axially oftlie shaftand we be disengaged upon movement' of said memher his reverse direction along said shaft.

9. In a signaling device, a casing, a diaphragm, a diaphragm actuator, a shaft upon which said actuator ismounted, said shaft formed with a spirally disposed pathway and having its ends supported from said casing, a member movable longitudinally of the shaft for rotating thesame, said member having 'pintles projecting from spaced portions thereof, said casing provided with an elongated slot and a handle pivotally supported from the casing and having one end ccting outwardly through said slot, and its other end formed in a yoke, the arms of said yoke provided with jaws for engaging the respective pintles moving said member along the shaft as'fthe said handle is rocked about its pivot. V

10. In a signaling device, a casing, a diaphragm, a diaphragm actuator, a shaft upon which said actuator ismount'ed, said shaft formed with a spirally disposed pathway and having its ends supported from said casing, a member movable longitudinally of the shaft for rotating the same, said member having pintles projecting from spaced por tions thereof, said'casing provided with an elongated slot and a handle pivotally supported from the casing and having'one end projecting outwardly through said slot, and

its'other end formed in a yoke, the arms or said yoke provided with jaws for engaging the respective pintl'es for movingsaid memher along the shaft as the said handle is rocked aboutfits pivot, and means for returning the handle'and thereby the said member to starting position after each rocking'movement. 1 7

11, A mechanical horn comprising a shaft having a fixed'striker and a worm groove, a diaphragm over which the striker Is adapted to operate, ayieldingly supported member having a flange, a clutc evlce 0080MB? with the groove,a nd supported hy-si flange, a clutch device carried s stematber and spaced from the first device normally and adapted to fixedly engage with rei ned said first deviceon-Inovement of the member ot' er infa direction axiallyof the Sljlfiflifllnd "clutch 'devices'in connection with theshaft actuator and said member adapted to interengage u on movement of said mem berin one' directioiiaiiially'of the Shea and to be disengaged upon movement of said member in a reverse direction alon said shaft, pintles upon 0 posite'sides 0? member, a 'lever pivota ly' carried ing and having a p ner open side gagingthe pinneson said member;

13. n a signaling device, rotary actuator for vibrating "SBid fliaphragim aspiral shaftupon 'which said actuator ismounted a shaft actuator, a member for niiving the shaft actuator along the shaftfsjaid shaft actuator and said member having a limited movement relatively to each other in a direction axially of the shaft, clutch devices in; connection with the shaft actuator and said member adapted to interengage upon movement of said member in one direction axially of the shaft and tobe disengagedupon movement'of said mem er in a reverse direction alon 1 said shaft,- pintles upon 0 posits sides" 0 said memheig'a leverpivota 1y carried b the easi-ng and havlnga pair of open-sided jaws engagingthe 'pintles on said'meinher, 'agsprin havmg one end engaged with the easin an lts I intermediate 5 portion engaged with the pivot of the lever, and its'opposite endengaged withthe ieverfor restoring the handle to a'normal'starting osition after each operation in the reverse direction.

In asignalin "device, a diaphragm, a rotary actuator for vibrating said diaphragm, aspiral shaft upon which said actuator'ls mounted, a shaft actuator,"a casing substaniiiall' inclosing the shaft actuator and adapts "for movii'i said shaft actuator along the shaft, said' s aft actuator having a l'imited movement within the casin in a d rection axially of the shaft,'elutch evices ineonnection with the shaft actuator and said member adapted to'interengage upon movement of said member in one direction axiallyofthe shaftand to be disengaged upon movement; of said member in a reverse direction alongt'he shaft. Y I

15. A signal comprising a diaphragm, a resonator fat the front of the diaphra m, a cais'ingat the'rear of the dia liragm, a shaft within thecasin a f d fotata; ly mounted in substantial parafielisinwith the diaphragm, a diaphragm"'ac'tuator mounted upon the a' shaft actuator, a

a limited movement relatively:

said in? the cas jaws en;

shaft and rotating with the shaft and in a plane substantially perpendicular to the dia phragm and adapted to ooact with the diaphragm to force vibration of the latter as the former is rotated, a nut movable lon itudinally of said shaft, a pivoted han 1e having a portion disposed outside the casing and another portion within the casin and adapted to move said nut longitudina l of the shaft, means for holding the nut rom rotation when moved longitudinally in one direction whereby the shaft is rotated and allowing free rotation of the nut when moved in a reverse direction whereby the shaft may Copies of this patent may be obtained for five cents each, by addressing the remain stationary, and a sprin having one end supported by the casing and its intermediate portion wrapped around the pivot of the lever and its opposite end engaged with the lever for effect1n such reverse movement without material y decreasing the momentum of said actuator.

In witness whereof I have hereunto set my hand this 12th day of November, 1913.

WILLIAM SPARKS.

Witnesses:

VIOLA HoWnAND, E. A. THOMPSON.

commissioner of Patents,

- Washington, D. 0." 

